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下肢全长X线检查是膝关节外科常用的检查手段,用以评估下肢骨骼及关节面的外形及状态、规划手术操作以及预计术后远期效果.其拍摄质量取决于多种因素,包括拍摄技术,拍摄体位,关节内及关节外畸形的影响等,本文对此做一综述.“,”The full-length X-ray of the lower limbs is a common auxiliary examination in the joint surgery, which could help surgeon decide the shape and condition of the bone and joint, plan the manipulate of the operation and forecast the oper-ation result in long run. It could be influenced by many factors, such as shooting technology, limb posture, intra-articular or extra-articular deformity. We will detail the fields mentioned above in this paper.